Stains on window and door glass

Causes

Alkaline run-off from concrete, cement plaster or cement mortar

Use of alkaline cleaners

Listed under: Interior, Exterior, glass, stains, doors, windows

Cause

Alkaline run-off from concrete, cement plaster or cement mortar

Repair

  • avoid alkaline run-off over the glass by painting concrete and cement plaster, diverting run-off from cement mortar
  • clean windows more frequently in areas of high atmospheric pollution such as industrial areas
  • if staining is not too severe, rub a paste of jeweller's rouge or whiting over stained area, rinsing thoroughly after application Alternatively use a proprietary glass cleaning system
  • replace severely deteriorated glass

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Cause

Use of alkaline cleaners

Repair

  • use only non-alkaline cleaners
  • clean windows more frequently in areas of high atmospheric pollution such as industrial areas
  • if staining is not too severe, rub a paste of jeweller's rouge or whiting over stained area, rinsing thoroughly after application Alternatively use a proprietary glass cleaning system
  • replace severely deteriorated glass

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